3a8e3abc7d
Fixes: #9492 Issue link: https://github.com/spring-projects/spring-integration/issues/9492 Switches `MockIntegrationContextCustomizerFactory` & `SpringIntegrationTestExecutionListener` to use `TestContextAnnotationUtils` in order to properly support `@NestedTestConfiguration` semantics. Adds an integration test with a base class and several `@Nested` inner test classes to verify the various permutations of `@SpringIntegrationTest` inherit/override behavior when used w/ `@NestedTestConfiguration`. **Auto-cherry-pick to `6.3.x` & `6.2.x`**